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This commit back-patches the v12-era commitsa73d08319,cc92cca43, and7570df0f3into supported pre-v12 branches. The net effect is to eliminate our former dependency on the never-standard sys_siglist[] array, instead using POSIX-standard strsignal(3). What motivates doing this now is that glibc just removed sys_siglist[] from the set of symbols available to newly-built programs. While our code can survive without sys_siglist[], it then fails to print any description of the signal that killed a child process, which is a non-negligible loss of friendliness. We can expect that people will be wanting to build the back branches on platforms that include this change, so we need to do something. Since strsignal(3) has existed for quite a long time, and we've not had any trouble with these patches so far in v12, it seems safe to back-patch into older branches. Discussion: https://postgr.es/m/3179114.1594853308@sss.pgh.pa.us
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.